XRT72L50 Datasheet, PDF (63/471 Pages) Exar Corporation – SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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XRT72L50
SINGLE CHANNEL DS3/E3 FRAMER WITH HDLC CONTROLLER
REV. 1.2.1
2.3.2.3 Part Number Register
Part Number Register (Address = 0x02)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Part Number Value
RO
RO
RO
RO
RO
RO
RO
RO
0
0
0
0
0
1
1
1
The Part Number register can be used by System-level software to identify this particular device as the
XRT72L50 Single Channel DS3/E3 Framer IC. The value of the Part Number register is 0x07.
2.3.2.4 Version Number Register
The Version Number register permits the user’s software to identify the revision number of the part. The very
first revision of the part will contain the value 0x01.
Version Number Register (Address = 0x03)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Version Number Value
RO
RO
RO
RO
RO
RO
RO
RO
0
0
0
0
0
0
0
1
2.3.2.5 Block Interrupt Enable Register
Block Interrupt Enable Register (Address = 0x04)
BIT 7
BIT 6
BIT 5
BIT 4
RxDS3/E3
Interrupt
Enable
Not Used
R/W
RO
RO
RO
0
0
0
0
BIT 3
RO
0
BIT 2
RO
0
BIT 1
TxDS3/E3
Interrupt
Enable
R/W
0
BIT 0
One-Second
Interrupt
Enable
R/W
0
Bit 7 - RxDS3/E3 Interrupt Enable
This Read/Write bit-field permits the user to enable or disable all Receive Section related interrupts at the
Block Level.
Setting this bit-field to "0" disables all Receive Section related Interrupts within the XRT72L50.
Setting this bit-field to "1" enables the Receive Section related Interrupts (within the XRT72L50) at the block
level.
NOTE: Setting this bit-field to "1" does not enable all Receive Section related Interrupts. Each of these interrupts can still
be disabled at the Source Level. However, setting this bit-field to "0" does disable all Receive Section related
Interrupts.
Bit 1 - TxDS3/E3 Interrupt Enable
This Read/Write bit-field permits the user to enable or disable all Transmit Section related interrupt at the Block
Level.
Setting this bit-field to "0" disables all Transmit Section related Interrupts within the XRT72L50.
Setting this bit-field to "1" enables the Transmit Section related Interrupts (within the XRT72L50) at the block
level.
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